This web page provides access to high-resolution (15-sec) NOAA Atlas 2 precipitation
frequency grids for 2-year and 100-year average recurrence intervals and for
6-hour and 24-hour durations for 5 states in the western U.S.
(Idaho, Montana, Oregon, Washington, Wyoming).

To view a scanned version of current NOAA Atlas 2 document for a specific state, please visit our PF Documents page.